You speak as if you've never read a YouTube comment section before. Yet you say you've read millions of comments? Maybe consider not reading rage-bait garbage all night long and talk to real people instead.
Not only are such comments generally not support for murder, but I'll let you in on a little known fact:
In the US Constitution there's a thing called the First Amendment.
It actually protects your right to say that you support murder. Either a real historical one or a hypothetical future one.
The more you know!
Were the posts about Kirk deserving it or posts critical of Kirk. People conflate the two. Most of the quotes weren't made up. He did call for political violence like the execution of Joe Biden and for a "patriot" to bail out the person who tried to murder Paul Pelosi.